Université de Montréal
Postdoctoral fellow candidate
Supervisor: Pierre Legendre
Frances Pick, University of Ottawa
Start: 2014-01-06
End: 2017-12-30
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Project

Modeling cyanotoxin concentrations in a changing world: The importance of space-time and cross-scale interactions
An important consequence of the large-scale increase in cyanobacteria is the potential for a parallel increase in neuro- and hepato-cyanotoxin produced by some cyanobacteria. Although strong local cyanotoxin models have been described in the literature, modeling the abundance of cyanotoxins across broader spatial scales has been difficult. For my postdoctoral research, I am examining the highly dynamic nature of cyanotoxin production across a large (>1000) dataset of lakes sampled by the USEPA. Using a combination of statistical approaches (two-way ANOVA for crossed designs with under-fitted interaction and generalized mixed effect models), I am testing whether the observed scale dependencies in cyanotoxin models results from space-time (different response models exist over time) or cross-scale (regional processes modulate local-scale relationships) interactions. My preliminary findings show that cross-scale interactions between local and regional drivers account for a significant portion of the among-region variability in local-scale cyanotoxin models.

Publications

1- Acceleration of cyanobacterial dominance in north temperate-subarctic lakes during the Anthropocene
Taranu, Zofia E., Irene Gregory-Eaves, Peter R. Leavitt, Lynda Bunting, Teresa Buchaca, Jordi Catalan, Isabelle Domaizon, Piero Guilizzoni, Andrea Lami, Suzanne McGowan, Heather Moorhouse, Giuseppe Morabito, Frances R. Pick, Mark A. Stevenson, Patrick L. Thompson, Rolf D. Vinebrooke,
2015 Ecology Letters

2- Quantifying Relationships Among Phosphorus, Agriculture, and Lake Depth at an Inter-Regional Scale
Taranu, Zofia E., Irene Gregory-Eaves
2008 Ecosystems

3- Contrasting responses of dimictic and polymictic lakes to environmental change: a spatial and temporal study
Taranu, Zofia Ecaterina, Dörte Köster, Roland I. Hall, Theo Charette, Francine Forrest, Les C. Cwynar, Irene Gregory-Eaves
2009 Aquatic Sciences

4- Land-Use Legacies Are Important Determinants of Lake Eutrophication in the Anthropocene
Finkel, Zoe, Bronwyn E. Keatley, Elena M. Bennett, Graham K. MacDonald, Zofia E. Taranu, Irene Gregory-Eaves
2011 PLoS ONE

5- The influence of time, soil characteristics, and land-use history on soil phosphorus legacies: a global meta-analysis
MacDonald, Graham K., Elena M. Bennett, Zofia E. Taranu
2012 Global Change Biology

6- Predicting cyanobacterial dynamics in the face of global change: the importance of scale and environmental context
Taranu, Zofia E., Ron W. Zurawell, Frances Pick, Irene Gregory-Eaves
2012 Global Change Biology

7- Proximity to ice fields and lake depth as modulators of paleoclimate records: a regional study from southwest Yukon, Canada
Chen, Guangjie, Daniel T. Selbie, Katherine Griffiths, Jon N. Sweetman, Morgan Botrel, Zofia E. Taranu, Sébastien Knops, Jennifer Bondy, Neal Michelutti, John P. Smol, Irene Gregory-Eaves
2014 Journal of Paleolimnology

8- Small Changes in Climate Can Profoundly Alter the Dynamics and Ecosystem Services of Tropical Crater Lakes
Émilie Saulnier-Talbot, Irene Gregory-Eaves, Kyle G. Simpson, Jackson Efitre, Tobias E. Nowlan, Zofia E. Taranu, Lauren J. Chapman
2014 PLoS ONE

9- Insights for lake management gained when paleolimnological and water column monitoring studies are combined: A case study from Baptiste Lake
Adams, Katrina E., Zofia E. Taranu, Ron Zurawell, Brian F. Cumming, Irene Gregory-Eaves
2013 Lake and Reservoir Management